Tonight's Snow Event.

We are currently under a winter storm watch and it will be updated to a winter storm warning soon.

My thoughts on tonight's snow:

• Now-8pm: rain/snow showers, snow above 500ft, turning to all snow
• 8pm-4am: snow, heavy at times 
• 4am - 10 am: a warm front will come through and depending on the placement of the low the timing of the switch to rain will vary by location.

Accumulation:

• South of PDX: 0 to 1 inch switch to rain at 2-3 am.
• PDX: 1-3 inches switch to rain at 4 -5 am.
• Clark County: 3-5 inches: switch to rain at 6-7 am.

Now why is the timing of the switch to rain so difficult? It is difficult because it all depend on the track of a low pressure system, If the system tracks to the north of Portland we would get strong south wind and switch to rain around 3 am . If the system goes over PDX then we would switch to rain around 6am,

Here is the 24 hour snowfall total ending at Wednesday 4pm